Old Faithful is famous for being one of the most iconic and predictable geysers in the world, located in Yellowstone National Park in the United States. It gained its fame for several reasons the first being predictability. Faithful means steadfast and loyal, and that it is.
Old Faithful erupts approximately every 90 minutes, making it one of the most predictable geysers in Yellowstone, and in the world for that matter. Visitors can rely on its regularity, which allows them to plan and witness it's eruptions.
The eruptions are impressive : When Old Faithful erupts, it can shoot hot water and steam up to 180 feet (55 meters) into the air. The eruption duration typically lasts around 1.5 to 5 minutes, making it a stunning natural spectacle.
It is geologically interesting because it is part of the Upper Geyser Basin, which is a geothermal hotspot with numerous geysers, hot springs, and other thermal features. Geologists and scientists have studied Old Faithful and the surrounding area to better understand the geothermal processes at work in Yellowstone.